Some codes that may be useful for MPS Chips:

Part Number SMT CODE
MP1470 ADJ
MP171 APL
MP174 AKC
MP20056 BK
MP2131 CA
MP2159 AFE
MP2234 ALZ
MP2315 AGC
MP2322 FN
MP2451 V7 or AML
MP3437 JDY
MP6550 GX
MP8759 AQQ
MPQ2172 BCG